Grinding wheel and mounting therefor



July 8, 1941. c. J; PHILLIPS 2 ,248,382

GRINDING WHEEL AND MOUNTING THEREFOR Filed Spt. 30, 1940 Zia/672$?Patented July 8, 1941 GRINDING WHEEL AND MOUNTING THEREFOR Charles J.Phillips, Kaukauna, Wis.

Application September 30, 1940, Serial No. 359,068

1 Claim.

Heretofore grinding wheels of this character have been provided with anarbor or shaft opening therethrough and the wheel has usually beensecured to the shaft through the medium of clamping discs mounted uponthe shaft and between which discs the wheel is located. The other facesof the disc contact the adjacent flat surfaces or faces of the grindingwheel, with the result that the wheel is secured to the shaft forrotation therewith, by friction.

It frequently happens that the wheel becomes cracked or broken, and byreason of the high speed of rotation of the wheel, portions or segmentsthereof will become dislodged from their frictional gripping means andwill be thrown out by centrifugal force, often resulting in seriousdamage.

To overcome these difficulties and objections and to provide improvedmeans for preventing portions of the wheel from being thrown out bycentrifugal force, in the event the wheel becomes broken, is one of theobjects of the present invention.

A further object is to provide improved means for strengthening andreinforcing the wheel.

To the attainment of these ends and the accomplishment of other new anduseful objects as will appear, the invention consists in the features ofnovelty in substantially the construction, combination and arrangementof the several parts hereinafter more fully described and claimed andshown in the accompanying drawing, illustrating this invention, and inwhich Figure 1 is a front elevation of a grinding wheel of thischaracter constructed in accordance with the principles of thisinvention.

Figure 2 is a sectional view showing a grinding wheel of this charactersecured to the end of an arbor or shaft.

The grinding wheel I is constructed of any suitable abrasive material,such as emery or the like, and may be of any desired thickness anddiameter, there being an opening I I therethrough at the diametriccenter thereof and through which opening the end I2 of a shaft or arborI3 passes.

Formed integral with the wheel I0 is a projecting rib I4 which ispreferably arranged concentric to the periphery of the wheel I0 and isspaced a substantial distance therefrom. The rib I4 is also arrangedconcentric to the axis of the disc and is preferably spaced for asubstantial distance therefrom. One of these ribs I4 is arranged on bothsides of the wheel I0 and are preferably in alinement with each other.

The ribs I4 are preferably of a substantial diameter in cross-sectionand are formed preferably from the same material as that from which thewheel I0 is constructed.

The numeral I5 designates clamping members preferably in the form ofdiscs of diameters considerably less than the diameter of the wheel I0.In one face of each of these discs I5 is arranged an open annular grooveI6. These grooves are spaced a substantial distance from the peripheryof the discs I5.

In assembling the parts and to secure the wheel In to the end I2 of theshaft'I3, one of the discs is placed upon the end I2 so that its faceI'l will contact a shoulder I8 on the shaft I3. The wheel II] is thenplaced upon the end I2 so that one of the ribs I4 will enter the grooveor recess I6 and the face I9 of the disc will contact the adjacent faceof the wheel.

The other disc I5 is then placed in position so that the groove orrecess I6 therein will receive the rib I4 while the face 20 of the discwill contact the adjacent face of the wheel II]. A washer 2| may then besleeved upon the shaft to contact the outer face of the outermost discand a nut or collar 22 may be threaded upon the screw threaded end 23 ofthe shaft to engage the washer and to co-operate with the shoulder I8for clamping the parts firmly together.

With this improved construction it will be manifest that the wheel IIIwill be secured to the shaft or arbor by friction and which friction issufi'icient under normal conditions to cause the wheel II] to turn withthe. shaft.

Should it so happen that the wheel ID of this construction should becomebroken, it will be manifest that none of the broken parts can be thrownoutwardly by centrifugal force by reason of the fact that the ribs I4engaging and being seated in the grooves or recesses I6, and. which ribsextend entirely around the face of the wheel, will hold the broken partsin assembled relation.

Furthermore, the ribs I4 serve as a means for reinforcing orstrengthening the wheel. Obviously any other means may be provided forfastening the disc I5 to the shaft.

While the preferred form of the invention has been herein shown anddescribed, it is to be understood that various changes may be made inthe details of construction and in the combination and arrangement ofthe several parts, within the scope of the claim, without departing fromthe spirit of this invention.

What is claimed as new is:

and between which discs the wheel is disposed, 10

there being an annular groove in the faces of the respective discs whichare adjacent the wheel for receiving said ribs, the remaining portionsof said faces of the discs being flat, and means for clamping the flatsurfaces of the discs in contact with the fiat faces of said wheel,whereby the entire inner faces of the discs will be held in contact withthe proximate faces of the wheel.

CHARLES J. PHILLIPS.

